COUNTRY music fans will need to mark these dates in their calendar: March 14 to 17, 2019.

That's when CMC Rocks rolls back into Willowbank for another year of live music and revelry.

Earlier this year the 11th annual event was the biggest to date, playing host to a record-breaking 20,000 music lovers after selling out in just one hour.

The 2018 festival, which injected an estimated $12m into the Queensland economy, also earned a Helpmann Award nomination for Best Contemporary Festival.

"The outstanding success of the 2018 event in driving visitation and boosting the local economy confirms yet again the importance of events to Queensland's economy," Queensland's Tourism Industry Development Minister Kate Jones said.

"With a long history of bringing high profile and diverse acts to the stage, CMC Rocks QLD will no doubt be a highlight on the Australian music calendar in 2019."

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In 2019, an extended festival program exclusively for campers will start the festivities at 1pm on Thursday, March 14 at the Jack Daniel's White Rabbit Saloon, and continue through to 2am the next morning.

The festival's main stage will open at 11:45am on the Friday to get the official celebrations started.

The new Sweetheart's Singles Mixer will also provide a forum for festival-goers to meet their Mr or Mrs Right. The festival is already popular for those wanting to pop the question, with several engagements taking place over the past few years.

The 2019 CMC Rocks line-up is expected to be announced in the coming months.